Susceptibility of Peruvian Mosquitoes to Eastern Equine Encephalitis virus
Abstract
Mosquitoes were collected in the Amazon Basin, near Iquitos, Peru, and used in experimental studies to evaluate their susceptibility to strains of eastern equine encephalitis virus (EEEV) that were isolated from mosquitoes captured within 20 Km of Iquitos. When fed on hamsters or chickens with a viremia of ~10(5) plaque-forming units (PFU) of virus per ml, Culex pedroi Sirivanakarn and Belkin, Aedes fulvus (Wiedemann), Psorophora albigenu (Peryassu), and Psorophora ferox (Von Humboldt) were susceptible to infection, while none of the Aedes serratus (Theobald), Culex vomerifer Komp, Culex gnomatos Sallum, Huchings, & Ferreira, Culex portesi Senevet and Abonnenc, or Culex coronator Dyar & Knab became infected, even though they fed on the same viremic blood sources. When these mosquito species fed on animals with viremias ~10(8) PFU per ml, Cx. pedroi, Ae. fulvus, Ps. albigenu, as well as Psorophora cingulata (Fabricius), were the most susceptible. Mosquito species were susceptible to both a Lineage II (Brazil-Peru) as well as a Lineage III (Argentina-Panama) isolate of EEEV. This study, combined with the repeated isolation of strains of EEEV from Cx. pedroi captured in the Amazon Basin region of Peru, indicate that Cx. pedroi is the primary enzootic vector of EEEV in this region.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2008
- Accession Number
- ADA486098
Entities
People
- C. Calampa
- D. Dohm
- D. Watts
- J. W. Jones
- M. L. O'guinn
- M. Zyzak
- Michael J. Turell
- R. Fernandez
- T. A. Klein
Organizations
- United States Army Medical Research Institute of Infectious Diseases